![Retrofitting the city with nature: The High Line New York: this project captured the public’s imagination and helped redefine and globally influence what urban green space can be; it demonstrates how quality city space can positively utilise obsolete city infrastructure and also how a project of this scale can be successfuly managed by the local community.](https://www.infrastructureusa.org/wp-content/uploads/2014/04/arup-highline.jpg)
ARUP
Reflecting the scale of the challenges ahead, there is urgency to develop more sustainably and this has become pervasive at all levels of government. The 1987 Brundtland Commission looked to unite countries worldwide to pursue sustainable development, and in 2006 the Stern Review on the Economics of Climate Change discussed the effect of global warming on the world economy. The main conclusion of the Stern report was that the benefits of strong, early action on climate change far outweigh the costs of not acting.